Lab News & Scientific Highlights
Watching lithium move in battery materials
In order to understand limitations in current battery materials and systematically engineer better ones, it is helpful to be able to directly visualize the lithium dynamics in materials during battery charge and discharge. Researchers at ETH Zurich and Paul Scherrer Institute have demonstrated a way to do this.
High-performance thermoelectric nanocomposites from nanocrystal building blocks
Using an assembly of colloidal nanocrystals a Ag-PbS nanocomposite was produced with increased thermoelectic figures of merit up to 1.7K at 850 K. EXAFS spectroscopy at the Ag K-edge was essential to show that Ag does not dissolve in PbS nanoparticles but preserved the individual nanodomains. This reduces the PbS intergrain energy barriers for charge transport
Controlling tunnelling in methane loss from acetone ions by deuteration
At the imaging Photoelectron Photoion Coincidence (iPEPICO) endstation of the VUV beamline evidence of H-atom tunneling was shown.
Struktur der Betonkrankheit
entschlüsselt
Wenn Brücken, Staumauern und andere Bauwerke aus Beton nach einigen Jahrzehnten von dunklen Rissen durchzogen sind, dann ist die sogenannte Betonkrankheit die Ursache. Wie das Material, das in diesen Rissen entsteht, auf der Ebene einzelner Atome aufgebaut ist, haben jetzt Forschende des Paul Scherrer Instituts PSI und der Empa entschlüsselt - und dabei eine bislang unbekannte kristalline Anordnung der Atome entdeckt.